Watch this 60 Minutes story about what researchers have been able to learn about aging by studying a community of retirees. There are some great insights, in particular into what we know (and more importantly don’t know) about dementia.

The G8 Dementia Summit starts today in London, bringing together ministers, researchers, pharmaceutical companies and charities to discuss the many facets of an increasingly prevalent condition. The World Health Organization estimates that worldwide, 35.6 million people have dementia and 7.7 million new cases are added every year. 65.7 million people will be living with dementia globally by 2030 and 115.4 million by 2050, with much of the increase occurring in developing countries. 1.4 million Canadians are expected to be affected by 2040.